R. Wittkopp

Electron probe analysis of freeze-substituted, epoxy resin embedded tissue for ion transport studies in plants

A. Spurr, A. Läuchli, R. Wittkopp, 1970, Planta.

Microscopic and Electron Beam Microprobe Study of Sulfide Minerals in Red Sea Mud Samples

J. Stephens, R. Wittkopp, 1969 .

Clinical and structural features of equine enteroliths.

M. G. Blue, R. Wittkopp, 1981, Journal of the American Veterinary Medical Association.